Insulating unit for cold storage and refrigerator insulation



Junev 6,1933. A, G, GlBsQN 1,912,631

INSULATING UNIT FOR COLD STORAGE AND REFRIGERATOR INSULATION Filed Aug. 9, 1930 y y Patented June 6,1933

LBERT G. GIBSON', 0F STQJOSEPH, MISSOURI i msumrrnelnm' ron comi sroaaca am) asrmsnaaroagmsumrron i 'llllicatioaled August 9, 1830, .gu-a1 fo, 474,336. l" 1 This invention relates to improvements in insulating units, `and refers specifically to the provision, in refrigerator, Vcold `storage insulation or the like, of a substitute for insulat# 5, ing, units ofthetype wherein a binder' and discontinuous pieces of material of ,low heat conductivity are used, and comprises a multi-` ply structure consisting of pliesofmaterial y aving inherent insulating properties, Aadherentlyunited by a film of adhesive interposed between the plies. A

In large refrigerator and cold storage installations, heat insulation is usually obtained byl lining the walls of the plant with insulating units comprisinga more or less homogeneous massV of discontinuous pieces of material of low heat conductivity, usually cork,

and a binder. An inherent disadvantageous feature resent in such installations is the lack of exibility in the replacement of such units. For instance, were a portion of the surface of the' insulatin walls torn or gouged, which frequently ia -larly inpackers refrigerators where hooks are used to handle the meat, to restore the insulating eiciency of' that portion of the wall would necessitate the removal and replacement of the entire unit so damaged.

` The adhesive material at 3, Fig. 2, if waterroof, prevents the permeation'of moisture yond the outer layer of 4board and the insulating value is only slightly reduced as compared to a condition where the insulating value of the entire block is reduced; where ex- 'treme temperatures are not maintained, it nay not be necessary -to even replace the outer ayer.

To obviate this waste, I provide unit insulating blocks of laminated insulated material, comprising alternate laminas of imerforate sheets of material having inherent insulating properties, and if desired, perforated or imperforate sheets of similar` may terial. VIf the latter type is used, the voids in said alternate sheets are, as. desired, either' maintained as dead air cells or filled with loosely associated particles of material having properties of low heat-conductivity, said of a laminated ppens, particualternate pliesbeinmaintained in the form bloc by adhesivelyuniting,

preferably cent plies. y e e If, for exam le," one of thesurfaces of my insulatingbloc is torn, gouged or saturated with moisture, there is no necessity of removing ,e the entire `block `since onlythat lamin which is `mutilatedmay be removed and a new lamineebe applied to the remaining block as byawaterprcof adhesive, `adjaa replacement. v i

y 'Otherandfur'ther advantages and features 50,

of myinvention will beapparent from the accompanying drawing and the following detail description.`

In the drawing Fig. 1 is a; top pianview, parte `being broken 01S" away,of an insulating blockconstructed in accordance with my invention; y e

Fig. 2 is a sectional view taken on the 2 2 ofFig.`1;,`

Figr is a top plan view, par'ts being broken 70 away, of a slight modification of my invention;` Fig. `4 is a sectional view taken on the line 4-4ofFig.3;`

Fig. 5 is atop plan view of a further modi- 7? fication of my'mventio'n; y' y y Fig. 6 is a sectional `view'taken on the line 66ofFig. 5`;'and" y L l" Fig. `7 is a fragmentary perspective fofa portion of a refrigerating compartment lined 8 with my insulating units.

Referring more in detail to the drawing, 1`v indicates a unitinsulatingblockwhich may comprise a plurality of sheets of material 2 possessinginherent qualities of insulation to sound `and heat.` The sheets 2 ma be adhe-` sively united asshown best at 3 ig. 2) by an adhesive material such as asphalt or any other adhesive possessing waterproong line l qualities; The block 1 may comprise one of 9,0

a plurality of units which may bebuilt upto form an insulatinglining `for a wall ofa refrigerator, coldstorage room, or anyotherA compartment which it may be found desirable i to insulate from sound or heat. y l ,95

f The sheets 2 may be constructed of ama`1` terial such as vegetable .'fiber, straw waste, felt, or anylike material which, whenformed, preferably by felting',`into sheets, possesses intrinsic lqualities of insulation. f In addition to having such above mentioned qualities, the material, when formed into sheets, must vpossess an element of rigidity. Thesheets may be square in form, oblong, or of any suitable geometrical shape.

It is to be understood, of course, that the block 1 may comprise any number of unit sheets 2, and said sheets may be of any de- It is to be understood that Vany number of p alternate plies 5 and 6 may be utilized in building up block 4, and that the alternate plies 5 and 6 may be of any vdesired thickness. The'material of which s id sheets 5 and 6 are constructed may be the same or, if desired, said sheets may be constructed of different materials, but at all events bothl sheetsare preferably constructed of Va material or materials which combine the quality of insulation with rigidity. The sheets 5 and 6 are preferably joined by'a waterproof adhesive such as asphalt or the like.

y Referring particularly to Figs. 5 and 6, a further modification of my invention is shown, wherein 8 indicates a block of insulation which may comprise alternate plies of imperforate material 9 and l,perforated plies 10. The space 11 thus formed in the sheet 10 between adjacent imperforate v lies 9 malyl be filled withna material 12, suc as loose y packed straw was/teor other loosely packed vegetable fibreI 'lhe sheets 9 and 10l may.: be joined by .an adhesive material such vas as halt or the like.

It isto understood, of course, that the space 11A providedin the sheet 10 may be of any particularsize and shape, and any number of said spaces may be provided between alternate sheets 9. It is also to be 'understood that instead of filling the space. of spaces 11, the same may be` maintained as dead air cells.

I am aware that many modifications of my invention may be devised without departing from the s irit thereof, and hence I do not wish to be imited ,except as necessitated by the prior art.

I claim as my invention:

An insulating unit for use in refrigerator and cold storage insulation, comprising a multi-ply structure consistin of alternate lies of rforated and imper orate material aving. mtrinsic properties of insulation adherently united by a ilmvf adhesive interosed between the plies providing dead air cells within the unit sa1d perforations being illed with loosely associated shredded insulating material. y 'In testlmony whereof I aix m signature.'

ALBERT IBSON.

A refrigerator or cold stora e wall 13 may f be lined with a plurality of-b ocks 14 which may take the form of blocks 1, 4 or 8, and, as canreadil be seen from the' constructionl of -said blocks, when the exterior `ply or plies of the same are mutilated, said ply or plies may be removed from the block proper and a new ply or plies may be mounted upon said block. v It is apparent that by this provision, the necessity for removing an entire block, when vthe outer surface thereof has been gouged or mutilated, elimi- 

